How to find a right value for hw.cbb.start_memory?

[Sergey A. Osokin]

On Thu, Dec 18, 2003 at 09:39:33AM -0800, Kevin Oberman wrote:
> > Does anyone have an idea how to find a right value for
> > hw.cbb.start_memory?
> > 
> > I use a 3Com Megahertz 56K Modem (3CXM756) with
> > my HP 6100 Omnibook notebook and with
> > device	pcic
> > device	card	1
> > works fine.
> > 
> > Part of verbose boot:
> > pcib2: device pccard0 requested decoded memory range 0xd0000-0xd0000
> > pcic: mem addr 0xd0000: reg 48: d0 0 d0 0 0 7f 10
> > pcic: mem addr 0: reg 48: 0 0 0 0 0 0 0
> > ...
> > pcib2: device pccard0 requested decoded I/O range 0x3f8-0x3ff
> > pcib2: device pccard0 requested decoded I/O range 0x2f8-0x2ff
> > ...
> > pccard0: Assigning sio4: io 0x2f8-0x2ff irq 10 flags 0x0
> > pcib2: device sio4 requested decoded I/O range 0x2f8-0x2ff
> > pcic: I/O win 0 flags 11 2f8-2ff
> > pcic: I/O win 0 flags 1 2f8-2ff
> > sio4 at port 0x2f8-0x2ff irq 10 slot 0 on pccard0
> > pcib2: device sio4 requested decoded I/O range 0x2f8-0x2ff
> > pcic: I/O win 0 flags 11 2f8-2ff
> > sio4: type 16550A
> > sio4: Forcing IRQ to 10
> > sio4: unable to activate interrupt in fast mode - using normal mode
> > 
> > I tried to use
> > device cbb
> > device pccard
> > device cardbus
> > but its don't work for me:
> > pcib2: device pccard0 requested decoded memory range 0x88000000-0xffffffff
> > CIS is too long -- truncating
> > pccard0: Card has no functions!
> > cbb0: PC Card card activation failed
> > 
> > Also I tried to change hw.cbb.start_memory to 0xd0202000,
> > but it don't help me.
> 
> hw.cbb.start_memory ust be greater than the actual DRAM on the
> system. So if you have 512 MB of memory (as I do), a working value will
> be at least 0x20000000. It might need to be higher. For 768M, start at
> 0x30000000 and if you have 1 GB, start at 0x40000000. 
> 
> I have 512 MB and set it at 0x20000000. I see agp at 0xe0000000, cbb0 at
> 0x50000000, cbb1 at 0x51000000 and fxp0 at 0xd0200000. I I tried
> starting at 0xd0202000, I would not have space for everything.

I think I found a right value, its 0xd0000000.

> You may also need hw.pci.allow_unsupported_io_range="1".

Already have this option in my /boot/loader.conf.local, thanks.

At this time I have some stranges with PCMCIA card, I already
drop a letter to imp at .  I think we have a bug in cbb implementation,
because if I have the hw.cbb.start_memory="3489660928" in
loader.conf.local kernel at boot time reports:
pcib2: device pccard0 requested decoded memory range 0xd0000000-0xffffffff
pccard0: Card has no functions!
cbb0: PC Card card activation failed
cbb0: ready never happened, status = 0c
start (d0000000) < sc->membase (d0200000)
end (ffffffff) > sc->memlimit (d02fffff)

And if I remove hw.cbb.start_memory string from loader.conf.local
and reboot machine, after boot I change hw.cbb.start_memory
from default to 3489660928 (aka 0xd0000000), remove card, then
insert again, I see in /var/log/messages:
Dec 18 16:27:53 hp6k1 kernel: pcib2: device pccard0 requested decoded memory range 0xd0000000-0xffffffff
Dec 18 16:27:53 hp6k1 kernel: sio4: <3Com Megahertz 3CXM756/3CCM756> at port 0x2f8-0x2ff irq 10 function 0 config 33 on pccard0
Dec 18 16:27:53 hp6k1 kernel: pcib2: device sio4 requested decoded I/O range 0x2f8-0x2ff
Dec 18 16:27:53 hp6k1 kernel: pcib2: device pccard0 requested decoded I/O range 0x2f8-0x2ff
Dec 18 16:27:53 hp6k1 kernel: device_probe_and_attach: sio4 attach returned 6

but sio device unusable:
$ ls /dev/cuaa*
cuaa0

Additional information:
$ uname -spr
FreeBSD 5.2-CURRENT i386

Any idea?

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